tayloe



(No Model.) I

W. H. TAYLOR.

LOOK. No. 380,537. Patented Apr. 8, 1888.

WITNESSES I v INVENTOR 6 WWW W'crrenfi". Taylor, LP

By flttorneys,

UNrrED STATES Farnnrr rrrcni \VARREN H. TAYLOR, OF STAMFORD CONNECTICUT,ASSIGNOR TO THE YALE 7 & TOXVNE BIIANUFACTURING COMPANY, OF SAME PLACE.

LOCK.

SPECIFICATION forming part of Letters Patent No. 380,537, dated April 3,1888.

Application filed November 14, 1887. Serial No. 255,089, (No model.)

To all whom it may concern: My invention consists in the special meansBe itknown that I, VVA'RREN H. TAYLOR, of of fastening an escutcheonwithin the interior Stamford, in the county of Fairfield and State of alock, as hereinafter specified, and sucof Connecticut,haveinventedacertain new and cinct-ly summed up in my appended claim.

5 useful Improvementin Locks, of which the fol- In the accompanyingdrawings, Figure lis 55 lowin is a specification reference bein had aview of a lock containin m in] movement a: 1 a 3 l to the accompanyingdrawings. one plate ofthe lock being removed; and Fig.

Myinvention relatesparticularlyto thatclass 2 is a detail view of myinvention detached of locks in which the tumblers are contained from alock.

[C in aseparate escutcheon or tumbler-case-such, Referring to theletters upon the drawings, 5 for instance, as the well-known Yale looks;A indicates a lock'case, B a lock-bolt, and C and it has for its objectthe prevention of the a screwthreaded escutcheon set into the caseremoval of this escutcheon or tumbler-case, exin the usual way. cept byone who is in possession of the key for D indicates a set-screw, and E aforked slide 1 unlocking the lock, and who, therefore, may adapted toenter the grooves in two opposite 6 be presumed to have the right toremove the escutcheons and hold them in place. escutcheon. The usualmethod of fastening an The devices thus far described are all old.escutcheon in place is by means of a set-screw Coming to what is new, Iprovide the ordipassing through the face .of the lock and ennaryset-screw fastening, F, and on it a pro- 2c gaging with a groove orother depression in jection, G. 70

the periphery of the cscutcheon, so that when H indicates a bell-cranklever pivoted at I,

the set-screw is turned out the escutcheon can and serving to throw thebolt into the unlocked be removed. There are also other methods ofposition against its spring when it is operated fastening in theescutcheon; but heretofore by means of the ordinary cam, K, upon thelocks have been so constructed that when the key-hub X, as will beobvious from the drawdoor was open and the face-plate accessible ings.This bell-crank is provided withashoulany person with a screw-driver orthe point der, L, which engages with the projection G,

of a knife could release the set-screw or other forming alatch-connection, thus securely dogstop, so that the cscutcheon could beunging the set-screw fastening. This bell-crank o screwed or otherwiseremoved. If such per levcris provided with aspring, M, which tends 8oson desired to efiect an entrance to the room or to keep it all the timein the position indicated house, he could release the set-screw or otherby the full lines in Fig. 2, in which position stop sufficiently, sothat while the turning of it is latched with the projection G upon thethe key to throw the bolt would not turn the setscrew fastening for theescutcheon. When 35 e cutcheon, the escutcheon could be turned by thekey is inserted and the hub turned, it will 25 the application of slightforce. Then, after the release the latch connection and throw the ownerhad left the door locked, as he supbell-crank lcverinto the positionshown by the posed, the evil-disposed person could return dotted linesin Fig. 2, and thus release the setand unscrew the escutcheon, orotherwise rescrew fastening of the escutcheon, so that it 0 ve it, andhave access to the interior of the can be withdrawn and the escutcheonremoved. 0

so that he could unlock it. My inven- At all other times the spring willkeep the belltl removes this source of weakness and procrank leverlatched with this projection of the vides a fastening for the escutcheonin the inset-screw fastening, so that it cannot be withterior of thelock which can only be released drawn and the escuteheon cannot beremoved;

5 by means of the proper key acting through thehenceitbecomcsirnpossible to releaseand with- 5 escutcheon itself. It isevident that if any one draw the escutcheon, except by the use of thehas the proper key to the lock he can gain ackey to unlatch the internalset-screw fastening.

cess to the room, and so will have no object, This invention is adaptedto ,be used with except a proper one, in removing the cscutchnumerousvarieties of locks having escutch- 50 con. eons or tumbler-cases ofsimilar nature. [09

The combination, in a lock having an escutcheon and set-screw fasteningtherefor, of

a projection, G, on'the set-screw fastening, a :5

spring actuated bell-crank lever, H, and a shoulder, L, on thebell-crank, forming alatch: connection, substantially as set forth.

In testimony whereof I have hereunto sub= scribed my name.

WARREN H. TAYLOR. 1 Witnesses:

SOHUYLER MERRITT, E. D. -OGDEN.

